The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9 ppm and standard deviation 1.7 ppm. 10 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N9 1.7 0 b. What is the distribution of ? N(9 .5376 c. What is the probability that one randomly selected city's waterway will have less than 8.8 ppm pollutants? d. For the 10 cities, find the probability that the average amount of pollutants is less than 8.8 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9 ppm and standard deviation 1.7 ppm. 10 randomly selected large cities are studied. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X-N9 1.7 0 b. What is the distribution of ? N(9 .5376 c. What is the probability that one randomly selected city's waterway will have less than 8.8 ppm pollutants? d. For the 10 cities, find the probability that the average amount of pollutants is less than 8.8 ppm. e. For part d), is the assumption that the distribution is normal necessary? Yes No
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9
ppm and standard deviation 1.7 ppm. 10 randomly selected large cities are studied. Round all answers to 4
decimal places where possible.
a. What is the distribution of X? X - N9
1.7
b. What is the distribution of ? N( 9
.5376 ✔ OB
c. What is the probability that one randomly selected city's waterway will have less than 8.8 ppm
pollutants?
d. For the 10 cities, find the probability that the average amount of pollutants is less than 8.8 ppm.
e. For part d), is the assumption that the distribution is normal necessary? O Yes No
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